Method of reducing the occurrence of crystalline silica in foamed glass by the introduction of chemical additives
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United States of America Patent
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Dec 23, 2014
Grant Date -
May 28, 2009
app pub date -
Jun 4, 2008
filing date -
May 19, 2004
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Abstract
A method of making a foamed glass body, including preparing an admixture of powdered glass, at least one carbonate based foaming agent, and at least devitrification inhibitor, heating the admixture to a first temperature to soften the glass, heating the admixture to a second, higher temperature to foam the softened glass into a foamed glass body, and cooling the foamed glass body. The crystal silica content of the so-formed foamed glass body is less than 1 weight percent.
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